A Brief History of Gravity

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Interesting Facts

• The Earth's moon has the ratio of 0.166 to that of Earth's gravitational acceleration, g.  While the planet Jupiter has a ratio of 2.36 to that of Earth's g.¹⁰
  
• Anti-Gravity chambers do not really exist, but microgravity is achieved by free fall conditions.⁹
  
• In 1798, British scientist Henry Cavendish (1731 - 1810) experimentally and accurately measured the gravitational constant, G, as 6.754 x 10 ^-11 N m ² kg ^-2.¹¹
• Today, the accepted value of the constant G is 6.67 x 10 ^-11 N m ² kg ^-2.⁶